5 Written questions
5 Matching questions
- Neurotransmitter (NT)
- a The potential that an excitable cell membrane must reach for an action potential to be initiated
- b A longitudinal bundle in a muscle cell (fiber) that contains thin filaments of actin and regulatory proteins and thick filaments of myosin
- c The fundamental, repeating unit of striated muscle, delimited by the Z lines
- d The ventral part of the vertebrate forebrain; functions in maintaining homeostasis, especially in coordinating the endocrine and nervous systems; secretes hormones of the posterior pituitary and releasing factors that regulate the anterior pituitary
- e A molecule that is released from the synaptic terminal of a neuron at a chemical synapse, diffuses across the synaptic cleft, and binds to the post synaptic cel, triggering a response
5 Multiple choice questions
- A change in a cell's membrane potential such that the inside of the membrane becomes more negative relative to the outside. Hyperpolarization reduces the chance that a neuron will transmit a nerve impulse.
- Wrapped around the axon of a neuron, an insulating coat of cell membranes from Schwann cells or oligodendrocytes. It is interrupted by nodes of Ranvier, where action potentials are generated
- A phenomenon of neural integration in which the membrane potential of the post-synaptic cell in a chemical synapse is determined by the combined effect of EPSPs or IPSPs produced in rapid succesion
- A substance that an organism cannot synthesize from any other material and therefore must absorb in preassembled.
- Animal tissue that functions mainly to bind and support other tissues, having a sparse population of cells scattered through an extracellular matrix
5 True/False questions
Interstitial Fluid → The fluid filling the spaces between cells in most animals
Graded Potential → A gated channel for a specific ion. The opening or closing of such a channels may alter a cell's membrane potential.
Tissues → A specialized center of body function composed of several different types of tissues
Nervous Tissue → Tissue consisting of long muscle cells that can contract, either on its own or when stimulated by nerve impulses
Tropomyosin → The regulatory protein that blocks the myosin-binding sites on actin molecules