Control and coordination Worksheet-15

Control and coordination Worksheet-15

 

Subjective questions:

  1. What is neuron?

 

  1. What are phytohormones?

 

  1. List two functions performed by ovaries in a human female.

 

  1. Write the function of hormone 'thyroxine' in our bodies.

 

  1. Name the part of hind-brain which takes part in regulation of respiration.

 

  1. Which hormone helps in lowering the level of blood glucose in human beings?

 

  1. We suddenly withdraw our hand when a pin pricks. Name the type of response involved in this action.

 

  1. Which hormone is responsible for the development of moustache and beard in men?

 

  1. Which type of glands in human body secrete hormones? State any one location for them.

 

  1. Name the structural and functional units of human nervous system.

 

  1. Why is oxytocin called as 'birth hormone'?

 

  1. Name two hormones of pancreatic islets.

 

  1. Deficiency of which hormone leads to diabetes mellitus?

 

  1. Which gland secretes glucagon?

 

  1. Name the hormone that promotes motility of sperms.

 

  1. Which part of the brain contains respiratory centre?

 

  1. Which hormone is known as birth hormone?

 

  1. Name the endocrine part of pancreas.

 

  1. Name one gland in human body which secretes digestive enzymes as well as hormones.

 

  1. Name the hormone which induces milk secretion.

 

Answer:

  1. Neuron is the largest cell in the body. It is an elongated branched cell having three components - Cell body, Dendrites and Axon. Neurons are, therefore, the structural and functional unit of the nervous system.

 

  1. Phytohormones can be defined as a chemical substance which is produced naturally in plants and are capable of translocation and regulating one or more physiological processes when present in low concentration.

 

  1. The two functions performed by ovaries in a human female are as follows:

(i) It secretes two female sex hormones, estrogen and progesterone.

(ii) It produces female gametes i.e., ova.

 

  1. Thyroxine regulates the metabolism of carbohydrates, fats and proteins in our body.

 

  1. The part of hind-brain which takes part in regulation of respiration is Pons.

 

Insulin helps in lowering the level of blood glucose in human beings.

 

  1. Reflex action or response.

 

  1. The hormone responsible for the development of moustache and beard in men is Testosterone.

 

  1. Endocrine glands in human body secrete hormones.

 

 

  1. The endocrine glands are located in different parts of the body e.g., hypothalamus is present in the brain.

 

  1. The structural and functional units of human nervous system are neurons.

 

  1. Oxytocin is called as 'birth hormone' because it stimulates the contractions of the smooth muscles of uterus at the end of pregnancy and helps in child birth.

 

  1. Glucagon and Insulin.

 

  1. Insulin.

 

  1. Pancreatic Islets of Langerhans.

 

  1. Testosterone.

 

  1. Pons of Hind Brain.

 

  1. Oxytocin

 

  1. Islets of Langerhans.

 

  1. Pancreas.

 

  1. Prolactin.