5 The process of differentiation occurs when (1) two different cells, a sperm cell and an egg cell, combine to produce a zygote (2) different zygotes are formed each time that an egg and sperm unite (3) different kinds of cells and tissues form during embryonic development (4) two different sexes are present among the offspring, after sexual reproduction

Strata granulosum is abundant with which cell? Dendrocytes Keratinocytes Melanocytes

Which of the following is dominated by adipose tissue? Epidermis Hypodermis Dermis

Which sweat glands are only found in restricted areas? Sebaceous gland Merocrine gland Apocrine gland

The plasma membrane participates in an important communication mechanism known as $\square $ transduction. (2) Need help? Review these concept resources.

Genetic disorder caused by a deletion of a gene on the copy of chromosome 15 inherited from the father is? Barr body Prader-Willi syndrome Angelman syndrome gene imprinting

Cholesterol in the skin is important for the synthesis of: (A) keratin (B) vitamin D (C) melanin (D) vitamin C

Fill In the Blank Question The $\square $ $\square $ is a continuation of the spinal cord that extends from the level of the foramen magnum to the pons. x

There is only one area of the brain that influence our feelings. True False

The central nervous system is composed of: The brain and spinal cord The spine and head The upper and lower appendages The peripheral nerves and endings

Multiple Select Question Select all that apply Which of the following are functions of lysosomes? Recycling of building blocks to make new molecules Digestion of substances taken in by endocytosis Synthesis of macromolecules in the cell Breaking down macromolecules in the cell