Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 4 Weeks Ago, 5 Days Ago |
Questions Answered: | 7559 |
Tutorials Posted: | 7341 |
BS,MBA, PHD
Adelphi University/Devry
Apr-2000 - Mar-2005
HOD ,Professor
Adelphi University
Sep-2007 - Apr-2017
1
What is the smallest region of the brain?
• Â
Midbrain
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Forebrain
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Hindbrain
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Every person's brain is different
2
Which of the following statements about brush cells is true?
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They are composed of villi, which are themselves composed of microvilli.
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They are found on the villi and have microvilli on them.
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They are found on the microvilli and have villi on them.
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They are a part of the lumen that removes harmful substances.
3
What condition, also known as "pink eye," occurs when the the clear membrane of the eye becomes inflamed?
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Astigmatism
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Conjunctivitis
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Cataracts
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Glaucoma
4
Which of the following is found on the outside of skeletal muscles?
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Sheath
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Bundles
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Sarcomere
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Myofibrils
5
What is it called when a clot prevents the brain from getting enough blood?
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Stroke
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Thrombosis
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Hemophilia
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Embolism
6
Which of the following is released by the brain when there is too little calcium in the blood?
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Parathyroid hormone (PTH)
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Osteoclasts
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Osteoblasts
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Calcitonin
7
Which organ(s) of the endocrine system is/are shared with another system?
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Thymus gland
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Testes and ovaries
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Thyroid gland
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Adrenal glands
8
Which of the following statements is true?
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Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.
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Diffusion requires ATP to function.
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Diffusion is the movement of molecules from an area of low concentration to an area of high concentration.
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Diffusion is the movement of molecules across a plasma membrane, regardless of concentration gradient.
9
Which part of the brain receives nerve impulses from the optic nerve?Â
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Visual cortex
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Brainstem
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Cerebral cortex
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10
Which of the following is an example of an integrator working to maintain homeostasis?
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The brain processes information about blood calcium levels being too high and determines that calcium levels need to be lowered.Â
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Thermoreceptors in your body detect a change in temperature when you walk into an air-conditioned building.
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The heart begins pumping faster if blood pressure drops too low.
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Muscle cells cause you to shiver in an attempt to raise your body temperature if it is too low.
11
What is chromatin?Â
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A condensed form of DNA that occurs when the cell is dividing
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A cell organelle that houses the DNA and controls activity within the cell
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A structure found within the nucleus that produces subunits of ribosomes
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A form of uncondensed DNA found within the nucleus of the cell
12
Which division of the peripheral nervous system is associated with involuntary muscle action?
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Somatic
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Parasympathetic
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Sympathetic
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Autonomic
13
Which of the following statements about enzymes is true?
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The function of an enzyme is to speed up chemical reactions that occur in your body.
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Enzymes are composed primarily of carbohydrates.
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Enzymes are single-use proteins that must be regenerated after each reaction.
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Enzymes can only break down larger substances into smaller ones.
14
What is the pinched region called where two sister chromatids are joined together?
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Chromosome
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Centrosome
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Centriole
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Centromere
15
Molecules called __________ have the ability to determine the speed at which transcription takes place.
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regulatory proteins
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transfer RNA
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start codons
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exons
16
What is a genetic mutation?
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Joining of DNA molecules
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Replication of DNA
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Change in DNA sequence
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Transcription of DNA
17
Which of the following sources of information is most credible?
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A high school biology textbook written and reviewed by a team of biology professors
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An unbacked statement from a trusted friend
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A lecture given by a biology teacher on the first day of class
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Medical advice given by a nursing intern during an appointment
18
Which of the following best characterizes red skeletal muscles?
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Red skeletal muscles, such as those in your legs and back, allow for longer sustained activities such as standing, walking or running.
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An olympic sprinter is highly reliant on red skeletal muscle because they contract very quickly for a short period of time.
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Red skeletal muscles are also sometimes referred to as "fast skeletal muscles" or "fast-twitch skeletal muscles."
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Red skeletal muscles contract more slowly than white skeletal muscles because they contain fewer mitochondria.
19
Select the immune defense that is specific to adaptive immunity.
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Antibody
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Skin
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Fever
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Inflammation
20
Which part of the large intestine is analogous to the urinary bladder?
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Appendix
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Descending colon
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Anus
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Rectum
21
The diagram shows the structure of the human heart.
 Â
Identify the part labeled Y.
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Aorta
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Inferior vena cava
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Pulmonary artery
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Superior vena cava
22
Before an oocyte leaves the ovary, it is surrounded by nourishing cells and is called what?
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An oviduct
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A menarche
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A zona pellucida
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A follicle
23
How many total chromosomes (autosomes + sex chromosomes) are in a human cell?
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46
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22
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44
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23
24
Which of the following conditions involves painful friction between two bones?
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Osteoarthritis
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Carpal tunnel
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Osteoporosis
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Dislocation
25
Which molecule helps maintain the pressure gradient of oxygen?
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Hemoglobin
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Alveoli
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Endothelium
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Respiratory membrane
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