General phys

Question 1

Peptide hormones and growth factors act on target cells by binding to ____ receptors

Answer 1

Cell surface

Question 2

Cholera toxins inhibits the ability of the alpha subunit of G’s to split GTP. The resulting effect is the ___ of Adenyl cycled

Answer 2

Stimulation

Question 3

Most growth factors are :

Answer 3

Protein-tyrosine kinase

Question 4

The first step in growth factor pathway activation is :

Answer 4

Receptor dimerization

Question 5

Cyclic AMP is synthesized from ATP by the reaction of

Answer 5

Adenyl cyclase

Question 6

The ip3 produced by phospholipase C acts to ?

Answer 6

Open calcium channels in the ER

Question 7

DaG or Diacylglycerol and calcium activate

Answer 7

Protein kinase c

Question 8

Protein kinase b regulates glycogen metabolism by ____ of glycogen synthase and thereby relieves its inhibition on glycogen synthase

Answer 8

Phosphorylation

Question 9

If the number of ipsp’s is more than the number of esps’s on a neuron then:

Answer 9

Chances for an action potential triggered by the neuron decrease

Question 10

Osmotic pressure of a solution decreases as the ___ content increases

Answer 10

H20

Question 11

The phospholipid bilayer, a major component of plasma membranes is most permeable to which ion

Answer 11

Calcium

Question 12

A protein that does not span through the entire phospholipid bilayer is

Answer 12

Peripheral membrane protein

Question 13

The transport of water across cells in the mammalian body is primarily dependent on the:

Answer 13

Number of osmotically active solute particles

Question 14

what happens if you add hypertonic saline solution to elf

Answer 14

icf volume will decrease

Question 15

Insulin released from the pancreatic cell is released into the circulation and signals on a target cell by binding to the receptor and the cellular response is increased glucose uptake. The receptor Is:

Answer 15

Cell surface, receptor tyrosine kinases

Question 16

Serum proteins in capillaries contribute to High:

Answer 16

Oncontic pressure in the capillaries

Question 17

A physiological phenomenon that describes a responsive adjustment to an environmental stress that is irreversible and is passed through genes to the next generation

Answer 17

Adaptation

Question 18

Increasing extra cellular K will cause the resting membrane potential to:

Answer 18

Increase

Make inside of cells more positive

Question 19

Beta adrenergic receptor of a hepatocyte regulate glycogen metabolism. This receptor is an example of:

Answer 19

GPCR

Question 19

In gcpr , what activates protein kinase a

Answer 19

Cyclic amp

Question 20

Steroid hormones are usually

Answer 20

Transcription factors

Targets of ligand receptor complexes

Question 22

insulin is secreted from the pancreas and affects glucose uptake in skeletal muscle. this is an example of ___ signaling.

Answer 22

endocrine

Question 23

sodium potassium pump is present on the ___ of intestinal cells

Answer 23

basolateral membrane

Question 24

a mutation of the na-k pump in a pig resulted in loss of its function; this will abolish the na gradient across the cell membrane. the glucose transport process that is affected by this defect is

Answer 24

co transport

Question 25

dehydration will lead to loss of water from

Answer 25

ecf and icf

Question 26

describe plasma membrane

Answer 26

phospholipid bilayer surrounding the cell

Question 27

what are the components of the extracellular fluid

Answer 27

plasma, interstitial fluid, trancellular membrane

Question 28

vitamin d acts by binding to __ receptor

Answer 28

intracellular

Question 29

epinephrine or glucagon bind to their __ receptors on the membrane and activate the cAMP

Answer 29

GPCR