Exam 1 part 4 Flashcards
Selective permeability leads to an unequal distribution of ____ between intracellular and extracellular
ions
The membrane potential arises from differences in __ concentration across the plasma membrane
K+
What 2 things lead to more K being inside the cell than outside the cell?
The K/Na pump and leaky K+ channels. K+ wants to leave so diffusion has it exit. which is largely responsible for charge maintenance
K+chemical force goes into/goes out of cell
out
K+electrical force goes into/goes out of cell
in
Na+electrical force goes into/goes out of cell
goes out
Na+chemical force goes into/goes out of cell
goes in
which of g proteins subunits opens or closes a gated channel
Alpha
_____ signaling is a form of cell-to-cell communication in which a cell produces a signal to induce changes in nearby cells, altering the behavior or differentiation of those cells.
Paracrine
______ signalling is a form of cell signalling in which a cell secretes a hormone or chemical messenger that binds to ______ receptors on that same cell, leading to changes in the cell.
autocrine
_____ signaling occurs between distant cells and is mediated by hormones released from specific endocrine cells that travel to target cells, producing a slower, long-lasting response.
Endocrine
______ signaling is similar to paracrine signaling but there is a special structure called the ______ between the cell originating and the cell receiving the signal. ______ signaling only occurs between cells with the _____; for example between a neuron and the muscle that is controlled by neural activity.
Synaptic
synapse
Synaptic
synapse
Most common second messenger is _____
cAMP
what regulates the blood osmolarity
The hypothalamus controls the mechanisms of ADH secretion, either by regulating blood volume or the concentration of water in the blood. so its hormonal
