Bio Q Bank Incorrect

Question 1

nipple stimulation

Answer 1

oxytocin and prolactin levels both increase, dopamine decreases.

Question 2

Which of the following permit the flow of ions between cells?
nucleus of smooth muscle cells, t-tubules of skeletal muscle cells, intercalated discs of cardiac muscle cells, or white fibers of skeletal muscle

Answer 2

Cardiac muscle cells are connected by intercalated discs, which contain many gap junctions directly connecting the cytoplasm of adjacent cells, thereby allowing for coordinated contraction - flow of ions

Question 3

vital capacity

Answer 3

inspir. reserve + expir. reserve + tidal volume

Question 4

all or nothing response in neurons

Answer 4

“All-or-nothing” refers to the fact that action potentials in a given neuron always result in the same magnitude of depolarization.

Question 5

ADH

Answer 5

released by post.pit. t directly alters the permeability of the collecting duct, allowing more water to be reabsorbed. alcohol and caffeine inhibit ADH- increase urinary output and decreased concentration

Question 6

keratinocytes

Answer 6

main component of the epidermis. Keratin is resistant to damage and provides protection against injury, water, and pathogens

Question 7

systole

Answer 7

During systole, the left and right ventricles are contracting as blood is pumped to the lungs and into the aorta. To prevent back-flow into the the left and right atrium, the left and right atrioventricular valves are closed, also know as the mitral and tricuspid valves, respectively.

Question 8

AV node

Answer 8

SA node- signal reaches the AV node, which sits at the junction of the atria and ventricles. The signal is delayed here to allow for the ventricles to fill completely before they contract.

Question 9

excessive production of ACTH

Answer 9

elevated cortisol, hypertension and weight gain, growth of adrenal cortex

Question 10

vesicle traffic in the cell

Answer 10

from the ER to the golgi, or golgi to the ER

Question 11

hydrostatic pressure vs osmotic pressure

Answer 11

hydrostatic pressure- force per unit area that blood exerts against wall. blood pressure. as heart contracts. pushes fluid OUT

osmotic pressure- drawing water IN

Question 12

which is higher at the arteriole end of a capillary? hydrostatic or osmotic pressure?

Answer 12

hydrostatic. osmotic stays the same but at the venule end osmotic is higher than hydrostatic= STARLING FORCES =balance

Question 13

layers of skin

Answer 13

hypodermis- fat and connective tissue

dermis- papillary layer, sweat glands, blood vessels, hair follicles

epidermis- 5 layers (stratum…) keratinocytes,

Question 14

Where is the electron transport chain located in prokaryotic cells?

Answer 14

plasma membrane

cell wall- structure and movement of solutes in/out

*remember no organelles or nucleus/nuclear region

Question 15

respiratory system graph

Answer 15

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Question 16

Darwin’s theory of evolution

Answer 16

Darwin’s theory of natural selection suggests that certain characteristics or traits possessed by individuals within a species may grant those individuals greater reproductive success, also known as an organism’s fitness (A). Darwin believed that these traits were heritable (B), and contributed to the evolution of populations (D). While Darwin believed that certain traits possessed by individuals were the result of chance variations within population, he did not base his theory on the tenet that all chance variations are necessarily beneficial (C).

Question 17

hormones that stimulate hunger

Answer 17

ghrelin and glucaon

THE G’s, think of a gremlin

Question 18

hormones that decrease hunger/ increase satiety

Answer 18

leptin and cholecystokinin (ADH/aldosterone)