Question

Sensory cells and sensory neurons allow multicellular animals to sense physical and chemical cues from their environment. what key properties of these cells enable them to perform this function? (select all that apply.) sensory cells and sensory neurons have electrically excitable membranes that change in charge potential in response to binding an environmental signaling molecule. sensory neurons have myelinated dendrites that serve as nerve endings. all sensory cells and sensory neurons fire action potentials when they bind a signaling molecule. sensory cells and sensory neurons have protein receptors linked to intracellular or membrane-based signaling pathways that alter ion channel permeability.

Answer 1

Answer:

A. Sensory cells and sensory neurons have electrically excitable membranes that change in charge potential in response to binding an environmental signaling molecule

B. Sensory cells and sensory neurons have protein receptors linked to intracellular or membrane-based signaling pathways that alter ion channel permeability.

Explanation:

Neurons have ability to change the charge potential across their membrane in response to certain stimulus or binding of signaling molecule. To allow the binding of signaling molecules, these neurons have receptors on their surface. The binding of signaling molecules affects the charge potential by affecting the permeability of ion channels. Hence, presence of receptors and ability of changing the ion concentration and thereby charge across their membrane allow the sensory cell and neuron to sense the stimulus.

Answer 2

The options for this question are:
A. Sensory cells and sensory neurons have electrically excitable membranes that change in charge potential in response to binding an environmental signaling molecule.
B. All sensory cells and sensory neurons fire action potentials when they bind a signaling molecule.
C. Sensory cells and sensory neurons have protein receptors linked to intracellular or membrane-based signaling pathways that alter ion channel permeability.
 The best answer choices are: A & C
Sensory cells and sensory neurons have electrically excitable membranes that change in charge potential in response to binding an environmental signaling molecule.
Sensory cells and sensory neurons have protein receptors linked to intracellular or membrane-based signaling pathways that alter ion channel permeability.

Explanation:
Sensory neurons are nerve cells within the nervous system responsible for converting external stimuli from the organism's environment into internal electrical impulses.
For example, some sensory neurons respond to tactile stimuli and can activate motor neurons in order to achieve muscle contraction. Sensory receptors located in the dermis or epidermises of the skin are called cutaneous receptors. These include nociceptors and thermoreceptors.