SCI115 Human Biology Introduction to Biology Final Milestone

1

What is the smallest region of the brain?

•  

Midbrain

•  

Forebrain

•  

Hindbrain

•  

Every person's brain is different

2

Which of the following statements about brush cells is true?

•  

They are composed of villi, which are themselves composed of microvilli.

•  

They are found on the villi and have microvilli on them.

•  

They are found on the microvilli and have villi on them.

•  

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?

•  

Astigmatism

•  

Conjunctivitis

•  

Cataracts

•  

Glaucoma

4

Which of the following is found on the outside of skeletal muscles?

•  

Sheath

•  

Bundles

•  

Sarcomere

•  

Myofibrils

5

What is it called when a clot prevents the brain from getting enough blood?

•  

Stroke

•  

Thrombosis

•  

Hemophilia

•  

Embolism

6

Which of the following is released by the brain when there is too little calcium in the blood?

•  

Parathyroid hormone (PTH)

•  

Osteoclasts

•  

Osteoblasts

•  

Calcitonin

7

Which organ(s) of the endocrine system is/are shared with another system?

•  

Thymus gland

•  

Testes and ovaries

•  

Thyroid gland

•  

Adrenal glands

8

Which of the following statements is true?

•  

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

•  

Diffusion requires ATP to function.

•  

Diffusion is the movement of molecules from an area of low concentration to an area of high concentration.

•  

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? 

•  

Visual cortex

•  

Brainstem

•  

Cerebral cortex

•  

10

Which of the following is an example of an integrator working to maintain homeostasis?

•  

The brain processes information about blood calcium levels being too high and determines that calcium levels need to be lowered. 

•  

Thermoreceptors in your body detect a change in temperature when you walk into an air-conditioned building.

•  

The heart begins pumping faster if blood pressure drops too low.

•  

Muscle cells cause you to shiver in an attempt to raise your body temperature if it is too low.

11

What is chromatin? 

•  

A condensed form of DNA that occurs when the cell is dividing

•  

A cell organelle that houses the DNA and controls activity within the cell

•  

A structure found within the nucleus that produces subunits of ribosomes

•  

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?

•  

Somatic

•  

Parasympathetic

•  

Sympathetic

•  

Autonomic

13

Which of the following statements about enzymes is true?

•  

The function of an enzyme is to speed up chemical reactions that occur in your body.

•  

Enzymes are composed primarily of carbohydrates.

•  

Enzymes are single-use proteins that must be regenerated after each reaction.

•  

Enzymes can only break down larger substances into smaller ones.

14

What is the pinched region called where two sister chromatids are joined together?

•  

Chromosome

•  

Centrosome

•  

Centriole

•  

Centromere

15

Molecules called __________ have the ability to determine the speed at which transcription takes place.

•  

regulatory proteins

•  

transfer RNA

•  

start codons

•  

exons

16

What is a genetic mutation?

•  

Joining of DNA molecules

•  

Replication of DNA

•  

Change in DNA sequence

•  

Transcription of DNA

17

Which of the following sources of information is most credible?

•  

A high school biology textbook written and reviewed by a team of biology professors

•  

An unbacked statement from a trusted friend

•  

A lecture given by a biology teacher on the first day of class

•  

Medical advice given by a nursing intern during an appointment

18

Which of the following best characterizes red skeletal muscles?

•  

Red skeletal muscles, such as those in your legs and back, allow for longer sustained activities such as standing, walking or running.

•  

An olympic sprinter is highly reliant on red skeletal muscle because they contract very quickly for a short period of time.

•  

Red skeletal muscles are also sometimes referred to as "fast skeletal muscles" or "fast-twitch skeletal muscles."

•  

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.

•  

Antibody

•  

Skin

•  

Fever

•  

Inflammation

20

Which part of the large intestine is analogous to the urinary bladder?

•  

Appendix

•  

Descending colon

•  

Anus

•  

Rectum

21

The diagram shows the structure of the human heart.

   

Identify the part labeled Y.

•  

Aorta

•  

Inferior vena cava

•  

Pulmonary artery

•  

Superior vena cava

22

Before an oocyte leaves the ovary, it is surrounded by nourishing cells and is called what?

•  

An oviduct

•  

A menarche

•  

A zona pellucida

•  

A follicle

23

How many total chromosomes (autosomes + sex chromosomes) are in a human cell?

•  

46

•  

22

•  

44

•  

23

24

Which of the following conditions involves painful friction between two bones?

•  

Osteoarthritis

•  

Carpal tunnel

•  

Osteoporosis

•  

Dislocation

25

Which molecule helps maintain the pressure gradient of oxygen?

•  

Hemoglobin

•  

Alveoli

•  

Endothelium

•  

 

Respiratory membrane

 

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Status NEW Posted 08 Oct 2019 03:10 PM My Price 12.00

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file 1570560410-SCI 115 Human Biology Introduction to Biology Final Milestone Answers.docx preview (828 words )

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