An Allergen Circulating in the Bloodstream Affects Mast Cells Throughout

question 168

Multiple Choice

An allergen circulating in the bloodstream affects mast cells throughout the body,dropping blood pressure to dangerously low levels.This response is termed

• A)allergy.
• B)hypersensitivity.
• C)allergic rhinitis.
• D)anaphylactic shock.
• E)asthma.

---

Definitions:

Synaptic Cleft

A narrow gap between the terminal end of a neuron and the neighbouring neuron or cell, across which neurotransmitters are released for communication.

Passive Diffusion

The movement of substances across a cell membrane without the need for energy input, from an area of higher concentration to an area of lower concentration.

Primary Somatosensory Area

A region of the cerebral cortex involved in the processing of sensory information from the body.

Fingers and Hand

The terminal part of the human arm consisting of the palm and five digits, crucial for various functions like grasping, manipulating objects, and sensing.