Pcb 3712 Homework 4 Usf Osovitz

Front 1

Neural control is __________ than endocrine control, and better for ____________ travel time with ___________ signal inactivation.

Back 1

faster, shorter, faster

Front 2

During dehydration, the body secretes ______ ADH and ________ aldosterone.

Back 2

more, more

Front 3

Prolactin is a hormone that promotes development of mammary glands during pregnancy in females, and caring for young in both males and females. How can we explain this action by prolactin?

Back 3

Both sexes have prolactin receptors but differ in their target cell sensitivity

Front 4

A hormone which passes freely through a cell membrane also would likely ___________________ .

Back 4

need carrier molecules to travel the blood

Front 5

Uterine contraction and milk ejection are examples of _____________ control by _____________ cells.

Back 5

posterior pituitary, neurosecretory

Front 6

You are quantifying response of a vertebrate under stress. Which hierarchy of hormone response do you expect?

Back 6

neurohormones in hypothalamus -> anterior pituitary -> tropic hormones -> adrenal cortex -> cortisol

Front 7

Give an example of negative feedback at work.

Back 7

An anterior pituitary hormone that supresses hypothalamus secretion.

Front 8

During stress we would expect higher _______________ levels and lower ___________ levels.

Back 8

catecholamine, insulin

Front 9

Resting hormone levels are 150 ,77, and 90 for glucocorticoids, insulin, and gonadotropins, respectively in your human patient. Which levels would you expect just after a stressful event?

Back 9

D.

Front 10

By themselves, two hormones ADH and CRH each cause a small increase on ACTH secretion. During stress the brain signals release of CRH, which travels from the hypothalamus to the anterior pituitary where it causes a larger ACTH release than when only ADH or itself are present. What is a good descriptor of CRH?

Back 10

synergism with ADH

Front 11

The hormone levels of a person were tracked beginning at 7 am on Tuesday until 7 am Wednesday. We know that 7 doughnuts and 4 packages of beef jerky are missing. From this figure it is most likely the person ate the_______ on _______ .

Back 11

Doughnuts on Wednesday morning, and beef jerky for lunch on Tuesday.

Front 12

A: proprioreceptor (1) induces an action potential in a motor neuron (2)
B: a motor neuron (2) sends an action potential to the interneuron (3)
C: the interneuron (3) processes signals from the muscle spindle (2)
D: interneuron (3) sends a signal to the motor neuron (5)
E: motor neuron (4) sends action potential to flexor muscle (5)

Back 12

E: Motor neuron (4) sends action potential to flexor muscle (5)

Front 13

An involuntary twitch of a muscle in response to a stretch corresponds to:

Back 13

a monosynaptic reflex

Front 14

Muscle spindle mechanoreceptors are not active:

Back 14

when muscle force equals load

Front 15

If ATP runs out, what happens in muscles during contraction?

Back 15

myosin stays bound to actin

Front 16

Neurons excite muscle cells to contract at the neuromuscular junction. Which of the following is not a feature that occurs at this junction?

A: Depolarization of the motor neuron axon terminal
B: Release of calcium by the motor neuron
C: Opening of voltage gated ion channels in motor neuron
D: Acetylcholine receptors on the muscle cell bind to ligand

Back 16

B: Release of calcium by the motor neuron

Front 17

In a life or death situation, which of the following is not taking place?

A: suppression of digestion by the parasympathetic
B: dilation of the pupil by the sympathetic division
C: sympathetic division release of catecholamines
D: A and C

Back 17

A: suppression of digestion by the parasympathetic

Front 18

Which area of the human brain is proportionally much larger than a fish or amphibian?

Back 18

cerebrum

Front 19

Levels of luteinizing hormone (LH) are shown over the course of a season. What can we likely say about this animal in terms of reproduction?

Back 19

It reproduces in the summer

Front 20

Which of the following statements is not accurate?

A: ovulation alone does not imply menstruation
B: females in estrous may release pheromones
C: increases in lutenizing hormone inhibits ovulation
D: secondary oocyte is complete prior to ovulation

Back 20

C: increases in lutenizing hormone inhibits ovulation

Front 21

During a menstrual cycle, follicle stimulating hormone peaks during ____________ and lutenizing hormone peaks during ____________.

Back 21

ovulation, ovulation

Front 22

What can we say regarding fertilization?

A: Fertilization occurs in the uterine wall
B: egg development occurs in the ovary
C: sperm release enzymes which block other sperm
D: fusion of two nuclei
E: oocyte locates the sperm
F: triggers high oxytocin

Back 22

D: fusion of two nuclei

Front 23

Which of the following situations would interfere with the ability to discriminate whether a stimulus was light or touch?

A: The central nervous system can't tell which axon generated an action potential
B: Both light and touch receptors were stimulated
C: Receptors normally have a low degree of specificity
D: There was not an adequate stimulus of light receptors
E: Sensory organs have high peripheral filtering of stimuli
F: Touch receptors are more sensitive

Back 23

A: The central nervous system can't tell which axon generated an action potential

Front 24

Which of the following does not involve metabotropic transduction?

A: Tasting bitter
B: Smelling flowers
C: Tasting salt
D: Seeing flowers

Back 24

C: Tasting salt

Front 25

The ability of the vertebrate eye to distinguish colors depends on _________________.

Back 25

photopigment absorptive differences

Front 26

For the majority of sensory receptors, how do they deliver information about the degree of a stimulus?

Back 26

Receptor potentials are graded, and frequency of potentials vary with stimulus intensity

Front 27

You taste a fruit that tastes very sweet. Which of the following is most likely involved in this reception of flavor?

A: Na+ channels
B: secondary messengers
C: ionotropic receptors
D: K+ channels

Back 27

B: secondary messengers

Front 28

Metabotropic synapses involve __________ receptors while ionotropic synapses involve __________ receptors.

Back 28

G-protein coupled...ligand-gated

Front 29

Which of the following would not describe sensory receptors of the patellar reflex?

A: proprioreceptors
B: exteroreceptors
C: mechanoreceptors
D: sensory receptors

Back 29

B: exteroreceptors

Front 30

Unlike other stimulus receptors, those in the eye which have rhodopsin cause _____________.

Back 30

hyperpolarization