Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

What is the role of neurotransmitters such as acetylcholine and GABA?

To form the myelin sheath around the axon.

To provide energy for the transmission of nerve impulses.

To carry the chemical signal across the synapse to the next neuron.

To create a physical bridge for the impulse to cross the synapse.

None

What is the primary function of the myelin sheath that surrounds some axons?

To receive chemical signals from other neurons

To synthesize neurotransmitters for the neuron.

To act as an insulator and speed up impulse transmission.

To provide structural support to the cell body.

None

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Sternum

Scapula

Radius

Femur

None

The transmission of a nerve impulse across a synapse involves the conversion of signals. What is the correct sequence of this conversion?

Chemical signal to electrical signal to chemical signal

Electrical signal to mechanical signal to electrical signal

Chemical signal to mechanical signal to electrical signal

Electrical signal to chemical signal to electrical signal

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Afferent neuron

Efferent neuron

Interneuron

Sensory neuron

None

Which condition is characterized by the formation of a blood clot inside a blood vessel, obstructing the flow of blood?

Thrombosis

Artritis

Hemophilia

Anemia

None

The functional unit of the kidney responsible for forming urine is the nephron. Which part of the nephron is primarily responsible for the selective reabsorption of glucose and amino acids?

Collecting duct

Glomerulus

Proximal convoluted tubule

Loop of Henle

None

Which of the following best describes the cause of Alzheimer's disease as mentioned in the source material?

Shrinkage of brain tissue and reduced secretion of the neurotransmitter acetylcholine.

The formation of blood clots in the brain, leading to memory loss.

A genetic disorder affecting the myelin sheath, leading to muscle weakness

A progressive disorder caused by a lack of the neurotransmitter dopamine.

None

What is the unique feature of the first cervical vertebra, known as the atlas, that allows for the nodding motion of the head?

It has a long, downward-pointing spinous process.

It has a prominent odontoid process.

It has a large, thick centrum to support the skull.

It articulates with the skull and lacks a centrum.

None

10.

What is the main driving force behind the process of ultrafiltration in the glomerulus?

Osmotic pressure created by proteins in Bowman’s capsule.

Active transport of waste products into the nephron.

High hydrostatic pressure due to the differing diameters of afferent and efferent arterioles.

The diffusion of water down its concentration gradient

None

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