Question

QA) Which statement about the inflammation process is not true?

1. Infection causes macrophages to release cytokines, which send a signal that attracts neutrophils to the site of infection.

2. Infection in connective tissue causes mast cells to release histamine, which constricts nearby blood vessels.

3. Increased blood supply to the infected area results in redness.

4. Systemic inflammatory response (septic shock) occurs when inflammation throughout the body results in a high fever, low blood pressure, and reduced flow through capillaries.

QB) True or false

1) ____ Sensory neurons are located in the brain and integrate information received from dendrites, process the response, and generate an electrical action potential.

2) ____ Diverse biotic communities are more likely to contain species that provide stability to the community due to increased genetic diversity and species redundancy in functional roles.

Answer 1

Ans A. Inflammation is a immune response of organs against pathogens and irritants. It is characterized as redness with pain, swelling at the site of inflammation. When any pathogens infection, immune cells like macrophages, neutrophils, monocytes etc are recruited more by dilating blood vessels. Septic shock involves low blood pressure during inflammation in body.

Thus wrong option is second because histamine don't constrict but dilate the blood vessels.

Ans B. Blank 1: True. Sensory neurons bring signals from receptors to brain / spinal cord. Dendrite part of neuron receive signal, generate impulse which then transferred towards axon and in brain. Sensory part of brain also have sensory neurons. In brain sensory neurons are connected by interconnecting neurons.

Blank 2: True. Because more species diversity, more genetic diversity increase the stability in ecosystem.