返回卡包市场

Physiological Systems: signalling mechanisms

暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。

卡片总数: 24 张•内容版本: v4•公开卡包•更新时间: 8/1/2026

卡片预览 (24 张)

#1
正面 (问题)

Homeostasis

背面 (解答)

stable internal operating environment: keeps internal env. within limits

#2
正面 (问题)

Physiology

背面 (解答)

study of function (cells, tissues, etc)

#3
正面 (问题)

Physiological integration

背面 (解答)

body systems work together, all body systems under control/regulation of nervous system

#4
正面 (问题)

Intercellular signaling

背面 (解答)

between cells

#5
正面 (问题)

intracellular signaling

背面 (解答)

within cells

#6
正面 (问题)

Neurons

背面 (解答)

communicate via generation of chemical/electrical signals

#7
正面 (问题)

Chemical signals

背面 (解答)

communication at synapse; main chem signal: neurotransmitter

#8
正面 (问题)

Electrical sugnal

背面 (解答)

along plasma membrane of neuron; moving ions (movement of charge)

#9
正面 (问题)

Separation of charges

背面 (解答)

ions on either side of semi-permeable membrane: contributes to formation of membrane voltage (potential)

#10
正面 (问题)

Resting neuron

背面 (解答)

asymmetric distribution of ions across membrane (K+ more concentrated inside, others outside) –> resting membrane potential of ~ -70mV

#11
正面 (问题)

Ion transport

背面 (解答)

• facilitated diffusion (molecules that cant cross membrane on own) 2. active transport (energy used to transport substances against concentration gradient)

#12
正面 (问题)

Ion Channels

背面 (解答)

ion transport path: selective for specific ions, gated

#13
正面 (问题)

Ligan-gated

背面 (解答)

chemically gated

#14
正面 (问题)

Voltage-gated

背面 (解答)

changes in membrane voltage gated

#15
正面 (问题)

mechanical-gated

背面 (解答)

changes in membrane stretch gated

#16
正面 (问题)

Concentration Gradient

背面 (解答)

influences direction of ion movement: generated by differences in concentration b/ two regions (high to low)

#17
正面 (问题)

Electrical gradient

背面 (解答)

influences direction of ion movement: asymmetric distribution of charge, attraction between opposites: driving force, time/access no electrical gradient

#18
正面 (问题)

Electrochemical gradients

背面 (解答)

determines net flux (in or out of cell) for ion : presence/direction/strength of electrical/concentration gradients

#19
正面 (问题)

Equilibrium potential

背面 (解答)

Potential across membrane that produces electrical force on ion EXACTLY oppoite to force of concentration gradient: BALANCES ionic concentration gradient

#20
正面 (问题)

Electrical signals generated in a neuron

背面 (解答)

neurotransmitters bind to receptors (ion channels to open) –> temp. change in membrane potential bc change in movement of ions across membrane

#21
正面 (问题)

Neurotransmitter binding to receptor changes

背面 (解答)

Depoloarization: membrane potential = less negative/less polarized: Excitatory Post-Synaptic Potential (EPSP) Hyperpolarization: membrane potential gets more negative: Inhibitory “ “ (IPSP)

#22
正面 (问题)

Action Potential

背面 (解答)

if graded potentials depolarize membrane –> threshold voltage: neuron fires action potential

#23
正面 (问题)

Excitatory effect

背面 (解答)

brings membrane CLOSER to threshold to fire action potential

#24
正面 (问题)

Inhibitory effect

背面 (解答)

moves membrane AWAY from threshold