Question1.
Fill in the blanks in the following
(i) Artificial magnets are made in different shapes such as __________, __________ and ____________.
(ii) The Materials which are attracted towards a magnet are called________.
(iii) Paper is not a ______ material.
(iv) In olden days, sailors used to find direction by suspending a piece of
___________.
(v) A magnet always has __________ poles.
Answer:
(i) Artificial magnets are made in different shapes such as bar-magnet, cylindrical magnet and horse-shoe magnet.
(ii) The Materials which are attracted towards a magnet are called magnetic material.
(iii) Paper is not a magnetic material.
(iv) In olden days, sailors used to find direction by suspending a piece of bar-magnet.
Question2.
State whether the following statements are true or false
(i) A cylindrical magnet has only one pole.
(ii) Artificial magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
Answer:
Answer:
TSH - Thyroid gland
Oxytocin - breast and uterus
ACTH - adrenal gland
FSH - testes
Thyrotropin-releasing hormone - anterior part of the pituitary gland.
Explanation:
Thyroid-stimulating hormone or TSH stimulates the thyroid gland to release two hormones is T3 and T4 hormone. TSH is another hormone also known as thyrotropin.
Thus, TSH - Thyroid gland
The hormone oxytocin stimulates contractions in uterus muscles during childbirth and also release milk from the breasts.
Thus, TSH - Thyroid gland
Adrenocorticotropic or ACTH hormone triggers the adrenal gland to release a hormone called cortisol.
Thus, ACTH -
adrenal gland
Follicle-stimulating hormone or FSH triggers the ovaries to produce progesterone and estrogen. It has sexual and reproductive characteristics.
Thus, FSH - ovary and testes
Thyrotropin-releasing hormone or TRH, that triggers the release of thyroid-stimulating hormone (TSH) from the anterior part of the pituitary gland.
Thyrotropin-releasing hormone - anterior part of the pituitary gland.
Answer:
Microscopic finger like projections of mucosa in the small intestine are called <u>Villi.</u>
Explanation:
The interior membrane of small intestine have finger - like projection known as the villi, which helps to increase the surface area of the small intestine , which in turn increases the efficiency of the absorption of the vital nutrients, as the projections helps to increase the contact of the food.
Villi also facilitates the movement of food particles in the small intestine.
Hence,
Microscopic finger like projections of mucosa in the small intestine are called <u>Villi.</u>
