Brain And Behavior Exam 4

18 Questions | By Ekanye | Last updated: Mar 21, 2022 | Total Attempts: 304

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The human brain is the most powerful organ in the human body and scientists have unlocked much of its secrets and others haven’t. Most of human behavior can be explained by examining a person`s brain. How much do you understand about the human brain and behavior? Take up the quiz below and get to find out.

Questions and Answers

1.

Because the visual system integrates stimuli over time, its performance is relatively
- A.
  
  Fast, at the expense of sensitivity
- B.
  
  Slow but sensitive
- C.
  
  Fast and sensitive
- D.
  
  Sensitive, at the expense of acuity
2.

The magnocellular versus parvocellular distinction was made first with regard to _______ cells.
- A.
  
  Retinal bipolar
- B.
  
  Retinal ganglion
- C.
  
  Lateral geniculate
- D.
  
  Striate cortex
3.

An on-center/off-surround cells responds most strongly when
- A.
  
  The entire center and surround are illuminated
- B.
  
  A spot of light illuminates part of the center
- C.
  
  The entire center is illuminated
- D.
  
  A spot of light illuminates part of the sorround
4.

Which of the following best describes the complete androgen insensitivity phenotype in an XY adult human?
- A.
  
  Testes, uterus, fallopian tubes, labia, breast
- B.
  
  Testes, vas deferens, uterus, fallopian tubes, breast
- C.
  
  Testes, labia, clitoris
- D.
  
  Ovaries, uterus, fallopain tubes, labia, breast
5.

5-alpha-reductase is necessary for the development of the
- A.
  
  Gonads
- B.
  
  Wolffian ducts in males
- C.
  
  External genitalia in normal males
- D.
  
  Testes
6.

In the absence of the Sry protein, the indifferent gonad
- A.
  
  Atrophies
- B.
  
  Becomes an ovary
- C.
  
  Becomes a testicle
- D.
  
  Becomes both an ovary and a testicle
7.

Leptin inhibits the secretion of ____, which is an endogenous antagonist of melanaocortin receptors.
- A.
  
  Orexin
- B.
  
  Neuropeptide Y
- C.
  
  Alpha-melanocyte stimulating hormone
- D.
  
  Agouti-related peptide (AgRP)
8.

A primary tenet of homestasis is
- A.
  
  Repetition
- B.
  
  Redundancy
- C.
  
  Body temperature maintenance
- D.
  
  Water balance
9.

Extremely dilute urine is symptomatic of
- A.
  
  Diabetes insipidus
- B.
  
  Diabetes mellitus
- C.
  
  Drinking too much seawater
- D.
  
  A salty dinner
10.

Quanta of light that enter the eye are captured by
- A.
  
  Opsin
- B.
  
  Retinal
- C.
  
  Rhodopsin
- D.
  
  None of the above
11.

A difference between human and cephalopod eyes is that the latter lack
- A.
  
  A lens
- B.
  
  Six pairs of extraocular muscles
- C.
  
  A retina
- D.
  
  A blind spot
12.

The spatial frequency of a visual stimulus array is equivalent to the
- A.
  
  Predominant wavelenth(s).
- B.
  
  Number of changes in intensity per unit of visual angle
- C.
  
  Number of contours or boundaries across the entire visual space
- D.
  
  Number of discriminable differences within a region of visual space.
13.

Animals born in a rather early stage of bodily development are called
- A.
  
  Altricial
- B.
  
  Ectotherms
- C.
  
  Glabrous
- D.
  
  Precocial
14.

Development of masculine external genitalia is guranateed by the presence of
- A.
  
  The XY chromosome pattern
- B.
  
  The wolffian duct system
- C.
  
  Secretion of androgens
- D.
  
  None of the above
15.

Administering estrogens as well as androgens can masculinize female rat pups, but normal females are not masculinized by their own estrogen secretion because they have
- A.
  
  The mullerian duct system
- B.
  
  The XX chromosome pattern
- C.
  
  Female gender identify
- D.
  
  A circulating estrogen-binding protein
16.

The hormone______ which induces drinking, is vital to the homeostasis of water balance due to hypovolemia
- A.
  
  Corticosterone
- B.
  
  Vasopressin
- C.
  
  Angiotensin II
- D.
  
  Renin
17.

The heat production per unit of body weight is greatest in which of the following animals?
- A.
  
  Rats
- B.
  
  Cats
- C.
  
  Humans
- D.
  
  Elephants
18.

Injecting PYY (3-36) into rats causes them to
- A.
  
  Eat more
- B.
  
  Eat less.
- C.
  
  Maintain weight
- D.
  
  Become thirsty