Phis retake exam 1

Which of the following conditions are commonly treated with SSRIs?

Depression

How do SSRIs primarily affect serotonin levels in the brain?

By preventing the reuptake of serotonin

The Na+/K+ pump is constantly transporting ions except when K+ channels are open.

False

The intracellular fluid includes the fluid inside cells and blood plasma.

False

The Na+/K+ pump works against the electrochemical gradient. This gradient moves _______ out of the cell, against both gradients. This pump takes energy in the form of ______ which is broken down by an enzyme into _____ and _______.

Na⁺ ; ATP ; ADP ; Pi

The Na+/K+ pump transports _______ out of the cell and ________ into the cell per cycle.

3 Na⁺ out of the cell and 2 K⁺ into the cell

Why are cells in body organs generally within 100 um of a blood capillary?

to decrease mean diffusion time

The breakdown of hydrogen peroxide is catalyzed by

catalase

Leak channel proteins which are always open for K+ allow K+ to move out of the cell. This means K+ is moving ____ its concentration gradient. The gradient is ____ due to the concentration differences across the membrane.

down; steep

Most neuron and muscle cells have a resting membrane potential (set points) of ____.

−70 mV

1.) Respiratory System

2.) Endocrine System

3.) Digestive System

4.) Nervous System

1.) Removes carbon dioxide from the body

2.) Secretes Hormones

3.) Processes food for use by the body

4.) Detects and processes information through electrical signals

1.) Urinary System

2.) Cardiovascular System

3.) Endocrine System

4.) Respiratory System

1.) Regulates fluid balance

2.) Circulates blood throughout the body

3.) Maintains homeostasis

4.) Removes carbon dioxide from the body

An example of synaptic communication would be

neurotransmitters

The stimulus for dehydration is the osmoreceptors

False

Which of the following would increase saturation for binding sites?

concentration and affinity

Osmosis is the movement of _______ in attempt to bring solutions inside and outside of a cell into _______. The movement is from the _______ area to the ________ area.

water; equilibrium; diluted; concentrated

Which of these statements about homeostasis is true?

Negative feedback mechanisms act to correct deviations of a variable around a set point.